The driver, whose name was not being released late Thursday, was in police custody but had not been charged, an Illinois State Police spokesman said.

The van was headed north near 79th Street about 9 p.m. when it went out of control and struck a curb and a guardrail, the spokesman said.

The van flipped over several times and ejected at least two of the children, including the 11-year-old boy who died, the spokesman said.

All seven children were taken to area hospitals. A 9-year-old boy was in fair condition in Mt. Sinai Hospital, and a 10-year-old boy and a 4-year-old girl were in fair condition in Cook County Hospital. A 10-year-old girl was in fair condition in U. of C. Children's Hospital.

Two other children were at Advocate Christ Medical Center, Oak Lawn, where information on their conditions was not available late Thursday.

The driver was not injured, the spokesman said. Her relationship to the children was unknown.